Holes drilled as deep as 5 miles into the Earth's surface reveal that the rock temperature increases about 37 degrees Fahrenheit per 320 feet. Even on the deepest sea floor, rock remains slightly above freezing. - Provided by RandomHistory.com

7/2/13

Kissing may have originated when mothers orally passed chewed solid food to their infants during weaning. - Provided by RandomHistory.com

7/3/13

A solar eclipse happens every one or two years, but total eclipses can be seen by those within the moon's shadow only every few hundred years. The shadow cast by the moon races across Earth at hundreds of miles per hour, so the eclipse is over within a couple of minutes. - Provided by RandomHistory.com

7/4/13

There were 50 signers to the Declaration of Independence. Benjamin Franklin, John Adams, Thomas Jefferson, Roger Sherman and Robert R. Livingston comprised the Committee of Five that drafted the Declaration. Jefferson, regarded as the strongest and most eloquent writer, wrote most of the document. - Provided by RandomHistory.com

7/5/13

Dogs have three eyelids. The third lid, called a nictitating membrane or "haw," keeps the eye lubricated and protected. - Provided by RandomHistory.com

7/6/13

Early opera houses were often boisterous and unruly. They were also lit by candles which - when combined with perspiration, perfume, and little ventilation - made opera night fairly "ripe." - Provided by RandomHistory.com

7/7/13

The most effective way to prevent osteoporosis is to eat a diet rich in vitamin D and calcium, exercise, and do not smoke or drink in excess. - Provided by RandomHistory.com

7/8/13

U.S. researchers have found that women who were sexually abused as girls repeatedly have a 62% percent higher risk of heart problems later in life compared with other women who were not abused. Much of the risk was related to coping strategies, such as alcohol abuse, overeating, and drug abuse. - Provided by RandomHistory.com

7/9/13

100,000,000,000 tons of dynamite would have to be detonated every second to match the energy produced by the sun. - Provided by RandomHistory.com

7/10/13

On land, an animal the size of the blue whale would be crushed by its weight without the support of large, heavy bones. Because it is supported by water as a marine animal, the need for large, heavy bones is eliminated, allowing the blue whale to reach such a massive size. - Provided by RandomHistory.com

The fish with the most protein is the Yellowfin Tuna, with 30 grams per 100-gram serving. It is followed by anchovies (29 g), salmon (27 g), halibut (27 g), snapper (26 g), and tilapia (26 g). - Provided by RandomHistory.com

7/13/13

In America, the divorce rate peaked at 50% in the 1980s. While the national divorce has declined, a first marriage is still between 40-50% likely to end in divorce. - Provided by RandomHistory.com

7/14/13

A baby's first social smile appears between four and six weeks after birth. - Provided by RandomHistory.com

7/15/13

Kissing at the conclusion of a wedding ceremony can be traced to ancient Roman tradition where a kiss was used to sign contract. - Provided by RandomHistory.com

7/16/13

The bear ancestor is an offshoot of the ancient Canidae family of dogs, wolves, foxes, and coyotes. - Provided by RandomHistory.com

7/17/13

There are more than 500 million domestic cats in the world, with approximately 40 recognized breeds. - Provided by RandomHistory.com

7/18/13

Presidents James Madison and Thomas Jefferson were once arrested together for taking a carriage ride in the countryside of Vermont on a Sunday, which violated the laws of that state. - Provided by RandomHistory.com

7/19/13

When written with the English alphabet, Hawaiian uses only 12 letters and a symbol ('). - Provided by RandomHistory.com

In approximately 54% of human trafficking cases, the recruiter is a stranger, and in 46% of the cases, the recruiters know the victim. Fifty-two percent of human trafficking recruiters are men, 42% are women, and 6% are both men and women. - Provided by RandomHistory.com

7/23/13

Old World monkeys are divided into two subfamilies, generalists and specialists. Generalists eat almost anything, and specialists eat mainly leaves. - Provided by RandomHistory.com

7/24/13

Anyone can check to see if his or her name is on the latest list of hurricane names: Here >> . - Provided by RandomHistory.com

7/25/13

In 2007, nearly 900,000 arrests for marijuana violations were made in the United States. Approximately 90% of offenders charged with marijuana-related crimes were arrested for possession only. - Provided by RandomHistory.com

7/26/13

After the fall of Rome, human survival often became more important than breeding and training dogs. Legends of werewolves emerged during this time as abandoned dogs traveling in packs commonly roamed streets and terrified villagers. - Provided by RandomHistory.com

7/27/13

In 1965, a college student named Fred De Luca and family friend Dr. Peter Buck started Subway in Bridgeport, Connecticut. The first restaurant was called Pete's Super Submarines. Subway currently is located in 87 countries. - Provided by RandomHistory.com

7/28/13

The first well documented human pandemic occurred in 1889-90 and was called the Russian flu (H2N2) and killed approximately one million people. - Provided by RandomHistory.com

7/29/13

Research has found that pomegranates may help prevent breast cancer. Chemicals called ellagitannins block the production of estrogen, which can fuel some types of breast cancer. - Provided by RandomHistory.com

7/30/13

For 5,000 years Iraqis have been keeping bees. Honey is an important source of food and income for many Iraq families. - Provided by RandomHistory.com

7/31/13

The largest living lizard is native to Thailand. The monitor lizard can grow as long as 7 feet. - Provided by RandomHistory.com